Visualise in code the manifests & constructs of a landing-zone

aws.tf

resource "aws_organizations_account" "default" {
  name  = "my_new_account"
  email = "john@doe.org"
}

data "aws_billing_service_account" "default" {}

resource "aws_iam_user" "default" {
  name = "vault-aws-auth-user"
}

resource "aws_iam_access_key" "default" {
  user = aws_iam_user.default.name
}

resource "aws_iam_user_policy" "default" {
  name   = "vault"
  user   = aws_iam_user.default.name
  policy = data.aws_iam_policy_document.default.json
}

data "aws_iam_policy_document" "default" {
  version = "2012-10-17"

  statement {
    sid       = "AllowVaultAuth"
    effect    = "Allow"
    resources = ["*"]

    actions = [
      "ec2:DescribeInstances",
      "iam:GetInstanceProfile",
      "iam:GetUser",
      "iam:GetRole"
    ]
  }

  statement {
    sid       = "ManageOwnAccessKeys"
    effect    = "Allow"
    resources = [aws_iam_user.default.arn]

    actions = [
      "iam:CreateAccessKey",
      "iam:DeleteAccessKey",
      "iam:GetAccessKeyLastUsed",
      "iam:GetUser",
      "iam:ListAccessKeys",
      "iam:UpdateAccessKey"
    ]
  }
}

resource "vault_auth_backend" "default" {
  type = "aws"
}

resource "vault_aws_auth_backend_client" "default" {
  backend    = vault_auth_backend.default.path
  access_key = aws_iam_access_key.default.id
  secret_key = aws_iam_access_key.default.secret
}

resource "vault_generic_endpoint" "rotate_root" {
  ignore_absent_fields = true
  data_json            = jsonencode({})

  path = format(
    "%s/config/rotate-root",
    vault_aws_auth_backend_client.default.backend
  )
}

resource "vault_aws_auth_backend_role" "default" {
  backend              = vault_auth_backend.default.path
  role                 = "pki"
  auth_type            = "ec2"
  bound_account_ids    = [aws_billing_service_account.default.id]
  inferred_entity_type = "ec2_instance"
  token_ttl            = 60
  token_max_ttl        = 120
  token_policies       = [vault_policy.default.name]
}

boundary.tf

resource "boundary_scope" "default" {
  name                   = var.application
  description            = "My first scope!"
  scope_id               = boundary_scope.org.id
  auto_create_admin_role = true
}

resource "boundary_group" "default" {
  name     = var.application
  scope_id = boundary_scope.default.id
}

resource "boundary_host_catalog" "default" {
  name     = "My catalog"
  type     = "Static"
  scope_id = boundary_scope.default.id
}

resource "boundary_credential_store_vault" "default" {
  name     = var.application
  address  = var.vault_address
  token    = var.vault_token
  scope_id = boundary_scope.default.id
}

resource "boundary_credential_library_vault_ssh_certificate" "default" {
  name                = format("ssh-%s", var.application)
  credential_store_id = boundary_credential_store_vault.default.id
  path                = "ssh/sign/foo"
  username            = "foo"
}

consul.tf

resource "consul_namespace" "default" {
  name = var.application

  meta = {
    foo = "bar"
  }
}

resource "consul_acl_policy" "default" {
  name  = "agent"
  rules = <<-RULE
    node_prefix "" {
      policy = "read"
    }
    RULE
}

resource "consul_namespace_policy_attachment" "default" {
  namespace = consul_namespace.default.name
  policy    = consul_acl_policy.default.name
}

resource "consul_acl_role" "default" {
  name = "agent"
}

resource "consul_namespace_role_attachment" "default" {
  namespace = consul_namespace.default.name
  role      = consul_acl_role.default.name
}

github.tf

locals {
  github_oidc = "https://token.actions.githubusercontent.com"
  user_claim  = "workflow"

  sub_claim = tolist(format(
    "repo:%s:ref:%s",
    github_repository.default.full_name,
    github_branch.default.ref
  ))
  bound_claim = { "sub" = local.sub_claim }
}

resource "github_repository" "default" {
  name       = var.application
  visibility = "public"

  template {
    owner                = "github"
    repository           = "app-scoped-terraform-infra"
    include_all_branches = true
  }
}

resource "github_branch_default" "default" {
  repository = github_repository.default.name
  branch     = "main"
}

resource "github_team" "default" {
  name = var.application
}

resource "github_team_repository" "default" {
  team_id    = github_team.default.id
  repository = github_repository.default.name
  permission = "pull"
}

resource "vault_jwt_auth_backend" "default" {
  description        = "Vault Github OIDC Auth Method"
  path               = "github"
  type               = "jwt"
  default_role       = "github-action"
  oidc_discovery_url = local.github_oidc
  bound_issuer       = local.github_oidc

  tune {
    default_lease_ttl = "768h"
    max_lease_ttl     = "768h"
    token_type        = "default-service"
  }
}

resource "vault_jwt_auth_backend_role" "default" {
  backend           = vault_jwt_auth_backend.default.path
  role_type         = vault_jwt_auth_backend.default.type
  role_name         = github_repository.default.name
  bound_claims      = local.bound_claim
  user_claim        = local.user_claim
  bound_claims_type = "glob"
}

google.tf

resource "google_project" "default" {
  name   = var.application
  org_id = "1234567"
}

resource "google_service_account" "default" {
  account_id   = "service-account-id"
  display_name = "Service Account"
  project      = google_project.default.id
}

resource "google_project_iam_member" "sa_admin" {
  project = google_project.default.id
  role    = "roles/iam.serviceAccountKeyAdmin"
  member  = format("serviceAccount:%s", google_service_account.default.email)
}

resource "google_project_iam_member" "compute_viewer" {
  project = google_project.default.id
  role    = "roles/compute.viewer"
  member  = format("serviceAccount:%s", google_service_account.default.email)
}

resource "google_service_account_key" "default" {
  service_account_id = google_service_account.default.name
}

resource "vault_gcp_auth_backend" "default" {
  namespace   = vault_namespace.default.path
  credentials = based64decode(google_service_account_key.default.private_key)
}

resource "vault_gcp_auth_backend_role" "default" {
  backend           = vault_gcp_auth_backend.default.path
  role              = var.application
  type              = "iam"
  bound_projects    = [google_project.default.id]
  token_ttl         = 300
  token_max_ttl     = 600
  token_policies    = ["pki", "default"]
  add_group_aliases = true
}

kubernetes.tf

locals {
  namespace = format(
    "{{identity.entity.aliases.%s.metadata.service_account_namespace}}",
    vault_auth_backend.default.accessor
  )
}

resource "kubernetes_namespace_v1" "default" {
  metadata {
    name = format("%s-namespace", var.application)
    annotations = {
      name = var.application
    }
    labels = {
      env = var.env
    }
  }
}


data "kubernetes_service_account_v1" "default" {
  metadata {
    name      = "vault-auth"
    namespace = "kube-system"
  }
}

data "kubernetes_secret" "default" {
  metadata {
    name      = data.kubernetes_service_account_v1.default.default_secret_name
    namespace = "kube-system"
  }
}

resource "vault_auth_backend" "default" {
  namespace = vault_namespace.default.path
  type      = "kubernetes"
}

resource "vault_kubernetes_auth_backend_config" "default" {
  namespace          = vault_namespace.default.path
  backend            = vault_auth_backend.default.path
  kubernetes_host    = var.kubernetes_host
  kubernetes_ca_cert = data.kubernetes_secret.default.data["ca.crt"]
  token_reviewer_jwt = data.kubernetes_secret.default.data.token
}

resource "vault_kubernetes_auth_backend_role" "default" {
  namespace                        = vault_namespace.default.path
  backend                          = vault_auth_backend.default.path
  role_name                        = var.application
  bound_service_account_names      = ["*"]
  bound_service_account_namespaces = [var.application]
  token_ttl                        = 43200
  token_policies                   = [vault_policy.default.name]
  audience                         = "vault"
}

data "vault_policy_document" "default" {
  rule {
    path         = format("secret/data/%s", local.acl_template)
    capabilities = ["read", "list"]
    description  = "Allow access only to namespace area"
  }
}

resource "vault_policy" "kubernetes" {
  namespace = vault_namespace.default.path
  name      = var.application
  policy    = data.vault_policy_document.default.hcl
}

tfe.tf

data "tfe_organization" "default" {
  name = "organization-name"
}

resource "tfe_project" "default" {
  organization = data.tfe_organization.default.name
  name         = var.application
}

resource "tfe_variable_set" "default" {
  name         = "Test Varset"
  organization = data.tfe_organization.default.name
}

resource "tfe_project_variable_set" "default" {
  variable_set_id = tfe_variable_set.default.id
  project_id      = tfe_project.default.id
}

resource "tfe_team" "default" {
  name         = var.application
  organization = data.tfe_organization.default.name
  organization_access {
    manage_modules = true
  }
}

resource "tfe_team_project_access" "default" {
  access     = "read"
  team_id    = tfe_team.default.id
  project_id = tfe_project.default.id
}

vault.tf

locals {
  ssh_path = format(
    "ssh/sign/%s",
    vault_ssh_secret_backend_role.default.name
  )

  ssh_user = format(
    "{{identity.entity.aliases.%s.metadata.first_name}}",
    vault_jwt_auth_backend.default.accessor
  )
}

resource "vault_namespace" "default" {
  path = var.application
}

resource "vault_mount" "default" {
  namespace                 = vault_namespace.default.path
  type                      = "ssh"
  description               = "SSH secrets engine"
  default_lease_ttl_seconds = 3600
  max_lease_ttl_seconds     = 86400
}

resource "vault_ssh_secret_backend_ca" "default" {
  namespace            = vault_namespace.default.path
  backend              = vault_mount.default.path
  generate_signing_key = true
}

resource "vault_ssh_secret_backend_role" "default" {
  namespace               = vault_namespace.default.path
  name                    = var.role
  backend                 = vault_mount.default.path
  key_type                = "ca"
  algorithm_signer        = "rsa-sha2-512"
  allow_user_certificates = true
  allowed_users_template  = true
  allowed_users           = [local.ssh_user]
  allowed_extensions      = ["permit-pty"]
  default_user            = local.ssh_user
  max_ttl                 = "604800"
  ttl                     = "30m0s"

  default_extensions = {
    permit-pty = ""
  }
}

data "vault_policy_document" "default" {
  rule {
    capabilities = ["create", "update"]
    path         = local.ssh_path
  }
}

resource "vault_policy" "ssh" {
  namespace = vault_namespace.default.path
  name      = "ssh"
  policy    = data.vault_policy_document.default.hcl
}